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CVE-2026-88777: Vulnerability in Citrix NetScaler ADC

0
High
VulnerabilityCVE-2026-88777cvecve-2026-88777
Published: 09/27/2026 (09/27/2026, 16:37:44 UTC)
Source: CVE Database V5
Vendor/Project: Citrix NetScaler
Product: ADC

Description

CVE-2026-88777 is a memory overflow vulnerability in Citrix NetScaler ADC and Gateway products. It affects versions prior to 14.1-73.37 and 13.1-64.23, including certain FIPS and NDcPP variants. The flaw can cause unpredictable or erroneous behavior and may lead to Denial of Service conditions. The vulnerability has a high severity rating with a CVSS 4.0 base score of 8.8. No known exploits in the wild have been reported. The issue is not related to a cloud service and no specific patch links were provided in the data.

CVSS v4.0

Score 8.8high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
Low
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Affected software

Citrix NetScaler

ADC

Affected versions
>=0 <14.1-73.37>=0 <13.1-64.23=0

Citrix NetScaler

Gateway

Affected versions
>=0 <14.1-73.37>=0 <13.1-64.23
GitHub Actionsmore threats →ai
citrix/netscaler-adc
pkg:github/citrix/netscaler-adc
Affected versions
>=0 <14.1-73.37>=0 <13.1-64.23=0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/27/2026, 17:02:59 UTC

Technical Analysis

This vulnerability involves a memory overflow in Citrix NetScaler ADC and Gateway devices, affecting versions before 14.1-73.37 and 13.1-64.23, including FIPS and NDcPP versions. The overflow can cause the devices to behave unpredictably or crash, resulting in Denial of Service. The CVSS 4.0 vector indicates it is remotely exploitable without privileges or user interaction, with high impact on availability and moderate impact on confidentiality and integrity. The vendor has identified the affected versions but no explicit patch information is provided in the input data.

Potential Impact

Successful exploitation can cause Denial of Service by triggering unpredictable or erroneous behavior due to memory overflow. This can disrupt network services relying on Citrix NetScaler ADC and Gateway devices. There is no indication of confidentiality or integrity compromise beyond the availability impact. No known active exploitation has been reported.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround information is provided, users should monitor Citrix advisories for updates. Until a fix is available, consider limiting exposure of affected devices to untrusted networks.

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Technical Details

Data Version
5.2
Assigner Short Name
NetScaler
Date Reserved
2026-09-10T07:14:57.370Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6ab948d1f7a7c541063df7bd

Added to database: 09/27/2026, 16:48:17 UTC

Last enriched: 09/27/2026, 17:02:59 UTC

Last updated: 09/27/2026, 17:50:28 UTC

Views: 7

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